Blanc, Michael Jetzer, Philippe Tiwari, Shubhanshu
Published in
Classical and Quantum Gravity
The present cosmological model and the surveys favor the Universe with a small but positive cosmological constant Λ, which accounts for dark energy and causes an exponential expansion. This can have observational consequences in the current detection of gravitational waves, as most of the waveforms for gravitational radiation are computed assuming ...
Banihashemi, Batoul Shaghoulian, Edgar Shashi, Sanjit
Published in
Classical and Quantum Gravity
We study the thermodynamics of Einstein gravity with vanishing cosmological constant subjected to conformal boundary conditions. Our focus is on comparing the series of subextensive terms to predictions from thermal effective field theory, with which we find agreement for the boundary theory on a spatial sphere, hyperbolic space, and flat space. We...
Alves Batista, R Amelino-Camelia, G Boncioli, D Carmona, J M di Matteo, A Gubitosi, G Lobo, I Mavromatos, N E Pfeifer, C Rubiera-Garcia, D
...
Published in
Classical and Quantum Gravity
The unification of quantum mechanics and general relativity has long been elusive. Only recently have empirical predictions of various possible theories of quantum gravity been put to test, where a clear signal of quantum properties of gravity is still missing. The dawn of multi-messenger high-energy astrophysics has been tremendously beneficial, a...
Jones, D I Riles, K
Published in
Classical and Quantum Gravity
Rotating and oscillating neutron stars can give rise to long-lived Continuous Gravitational Waves (CGWs). Despite many years of searching, the detection of such a CGW signal remains elusive. In this article we describe the main astrophysical uncertainties regarding such emission, and their relation to the behaviour of matter at extremely high densi...
Borowiec, Andrzej Kowalski-Glikman, Jerzy Trześniewski, Tomasz
Published in
Classical and Quantum Gravity
In this paper, we find a class of Carrollian and Galilean contractions of (extended) Bondi–van der Burg–Metzner–Sachs (BMS) algebra in 3+1 and 2+1 dimensions. To this end, we investigate possible embeddings of 3D/4D Poincaré into the BMS 3 and BMS 4 algebras, respectively. The contraction limits in the 2+1-dimensional case are then enforced by appr...
Jersey, Kylan Hollis, Harold Chia, Han-Yu Sanjuan, Jose Fulda, Paul Mueller, Guido Guzman, Felipe
Published in
Classical and Quantum Gravity
The optical truss interferometer (OTI) is a contingent subsystem proposed for the LISA telescopes to aid in the verification of a 1pmHz optical path length stability. Each telescope would be equipped with three pairs of compact fiber-coupled units, each forming an optical cavity with a baseline proportional to the telescope length at different poin...
Borissova, Johanna Eichhorn, Astrid Ray, Shouryya
Published in
Classical and Quantum Gravity
The no-global-symmetries conjecture is central to the swampland program that delineates the boundary between effective field theories that can be obtained from a quantum theory of gravity to those that cannot. The conjecture states that virtual black-hole configurations in the path integral generate terms that violate all global symmetries in the e...
Dickinson, Robert Forshaw, Jeff Jenkinson, Ross Millington, Peter
Published in
Classical and Quantum Gravity
We revisit the Unruh effect within a general framework based on direct, probability-level calculations. We rederive the transition rate of a uniformly accelerating Unruh–DeWitt monopole detector coupled to a massive scalar field, from both the perspective of an inertial (Minkowski) observer and an accelerating (Rindler) observer. We show that, for ...
Lozanov, Kaloian D Pi, Shi Sasaki, Misao Takhistov, Volodymyr Wang, Ao
Published in
Classical and Quantum Gravity
Formation of cosmological solitons is generically accompanied by production of gravitational waves (GWs), with a universal GW background expected at frequency scales below that of non-linear dynamics. Beginning with a general phenomenological description of GWs associated with soliton formation, we demonstrate that universal GW background from axio...
Katsumata, Akihito Harada, Tomohiro Ogasawara, Kota Iizuka, Hayami
Published in
Classical and Quantum Gravity
We propose a prescription for a new series expansion of the periapsis shift. The prescription formulates the periapsis shift in various spacetimes analytically without using special functions and provides simple and highly accurate approximate formulae. We derive new series representations for the periapsis shift in the Kerr and the Chazy–Curzon sp...
